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RFbeam Microwave GmbH | Schuppisstrasse 7 | CH-9016 St. Gallen | www.rfbeam.ch | K-LC4 | data sheet

01/2018 – Revision A | Page 4/4

Sensitivity and Maximum Range

The values indicated here are intended to give you a

‘feeling’ of the attainable detection range with this mo-

dule. It is not possible to define an exact RCS (radar

cross section) value of real objects because reflectivity

depends on many parameters. The RCS variations ho-

√σ

r = 0.0167 · 10 ·

-s

40

.

Maximum range for Doppler movement depends

mainly on:

–

Module sensitivity

S:

-103 dBc (@0.5 kHz IF Bandwidth)

–

Carrier frequency

24.125 GHz

–

Radar cross section RCS “reflectivity”

of the object

> 50 m² for a moving car

by factors of 10 and more.

APPLICATION NOTES

The famous “Radar Equation” may be reduced for our

K-band module to the following relation:

r = 0.0167 · 10 ·

-s

40

Using this formula, you get

an indicative detection range of:

– 6 meters for a moving person.

– > 15 meters for a moving car

Please note, that range values also highly depend on

the performance of signal processing, environment

conditions (i.e. rain, fog), housing of the module and

other factors.

For simple detection purposes (security applications

e.g.) without the need of speed measurements, range

may be enhanced by further reducing the IF bandwidth.

With 250 Hz bandwidth and a simple comparator, we

get already a 15 m frontal detection range.

Datasheet Revision History

Version

Date

Changes

1.0

13. November 2017

initial release

RFbeam does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and

RFbeam reserves the right at any time without notice to change said circuitry and specifications.